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Nuclear Theory·nucl-th

Friday·May 12, 2023

5 papers—3 primary·2 cross-listed

All5Primary3Cross-lists2
  1. 04

    [Submitted on 11 May 2023] (cross-list from hep-ph)

    Elastic proton-neutron and antiproton-neutron scattering in holographic QCD

    Akira Watanabe🇨🇳 · Sayed Anwar Sirat🇨🇳 · Zhibo Liu🇨🇳

    The total and differential cross sections of the elastic proton-neutron and antiproton-neutron scattering are studied in a holographic QCD model, focusing on the Regge regime. Taking into account the Pomeron and Reggeon exchange, which are described by the Reggeized spin-2 glueball and vector meson propagator respectively, those cross sections are obtained. It is presented that the currently available experimental data of the total cross sections can be well described within the model. Once a single adjustable parameter is determined with the total cross section data, the differential cross sections can be calculated without any additional parameters. Although the available differential cross section data are limited, it is found that our predictions are consistent with those.

    Comments:
    14 pages, 4 figures, typos corrected
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
    arXiv:
    2305.06700 [pdf]
    EPJC(2023)·6 citations
  2. 05

    [Submitted on 11 May 2023] (cross-list from physics.atom-ph)

    Screening of electric field and nuclear EDM in non-stationary states of atoms and molecules

    V.V. Flambaum🇦🇺

    According to the Schiff theorem, an external electric field vanishes at atomic nucleus in a neutral atom in a stationary state, i.e. it is completely shielded by electrons. This makes a nuclear electric dipole moment (EDM) unobservable. We show that if atom or molecule is not in a stationary state (e.g. in a superposition of two stationary states), electric field on the nucleus is not zero and interaction with nuclear EDM does not vanish. In molecules this effect is enhanced by the ratio of nuclear mass to to electron mass, , since nuclei in a molecule are slow (compare to electrons) and do not provide efficient screening in a non-stationary environment. Electric field on the nucleus may also affect nuclear reactions.

    Comments:
    arXiv admin note: substantial text overlap with arXiv:1804.08898
    Subjects:
    Atomic Physics (physics.atom-ph); High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    2305.06742 [pdf]
    PRA(2023)·1 citation

Affiliations

first authorsco-authorsvia INSPIRE